As others have said you need to read your contract, that will( should) specify what your terms and conditions are and whether there is a requirement to work away. ( I have to say that it's fairly common practice in this trade) If it does require you to work away it should specify travel and lodging payments etc. If not it is entirely reasonable for you to ask. You did not say when this is to be, next week, next month and for how long. Whether he can dismiss you if you refuse is all down to the wording of the contract and if what he is asking of you is reasonable i.e. how much notice is he giving you etc given that you do not normally work away. To be on the safe side whatever the contract says I'd approach any potential refusal( should that be what you choose to do) in a diplomatic way as Axel is not wrong, he may wait to find another excuse if he's so minded. Good luck..working away under some circumstances is not that bad, but it does depend on your personal commitments.